Home / 687,796.40-1,031,840.40-207,984.80

Finding the Fourth Proportional to 687,796.40, 1,031,840.40 and 207,984.80

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Solution

The fourth proportional to 687,796.40, 1,031,840.40 and 207,984.80 is: 312,021.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,796.40 : 1,031,840.40 = 207,984.80 : x
  2. Step 2: Convert to fraction form
    687,796.40/1,031,840.40 = 207,984.80/x
  3. Step 3: Cross multiply
    687,796.40x = 1,031,840.40 × 207,984.80
  4. Step 4: Simplify right side
    687,796.40x = 214,607,119,225.92
  5. Step 5: Solve for x
    x = 214,607,119,225.92/687,796.40
  6. Step 6: Final answer
    x = 312,021.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.